#include<stdio.h>
#include<stdlib.h>
int main(void)
{
    int num1,num2;
    char sign;
    
    scanf("%d %c %d",&num1,&sign,&num2);
    
    switch(sign){
        case '+':
        printf("%d",num1+num2);break;
        case '-':
        printf("%d",num1-num2);break;
        case '*':
        printf("%d",num1*num2);break;
        case '/':
        printf("%d",num1/num2);break;
        case '%':
        printf("%d",num1%num2);break;
        default:
        printf("ERROR");


    }

    return 0;

}